jQuery.fn.extend({
	    uploadPreview: function (opts) {
	        var _self = this,
	            _this = $(this);
	        opts = jQuery.extend({
	            Img: "ImgPr",
	            Width: 100,
	            Height: 100,
	            ImgType: ["gif", "jpeg", "jpg", "bmp", "png"],
	            Callback: function () {}
	        }, opts || {});
	        _self.getObjectURL = function (file) {
	            var url = null;
	            if (window.createObjectURL != undefined) {
	                url = window.createObjectURL(file)
	            } else if (window.URL != undefined) {
	                url = window.URL.createObjectURL(file)
	            } else if (window.webkitURL != undefined) {
	                url = window.webkitURL.createObjectURL(file)
	            }
	            return url
	        };
	        _this.change(function () {
	            if (this.value) {
	                if (!RegExp("\.(" + opts.ImgType.join("|") + ")$", "i").test(this.value.toLowerCase())) {
	                    alert("选择文件错误,图片类型必须是" + opts.ImgType.join("，") + "中的一种");
	                    this.value = "";
	                    return false
	                }
	                if ($.browser.msie) {
	                    try {
	                        $("#" + opts.Img).attr('src', _self.getObjectURL(this.files[0]))
	                    } catch (e) {
	                        var src = "";
	                        var obj = $("#" + opts.Img);
	                        var div = obj.parent("div")[0];
	                        _self.select();
	                        if (top != self) {
	                            window.parent.document.body.focus()
	                        } else {
	                            _self.blur()
	                        }
	                        src = document.selection.createRange().text;
	                        document.selection.empty();
	                        obj.hide();
	                        obj.parent("div").css({
	                            'filter': 'progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)',
	                            'width': opts.Width + 'px',
	                            'height': opts.Height + 'px'
	                        });
	                        div.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = src
	                    }
	                } else {
	                    $("#" + opts.Img).attr('src', _self.getObjectURL(this.files[0]))
	                }
	                opts.Callback()
	            }
	        })
	    }
	});